Yet the 35-year-old HGTV host always manages to look amazing on- and off-camera (not to mention, she can seriously rock a bikini). We spoke to the star when she was filming the most recent season of her series, and she shared her secrets to staying in shape.

"I'm a creature of habit," Christina told us-and that goes for her workout routine and her diet.

Christina runs every morning.

"I usually take my French bulldog [Cash] for a three-mile jog in my neighborhood," she said. "It takes about 30 minutes-it's a great workout. It keeps me in shape and I feel like it helps clear my head for the day."

After a quick shower, she heads to hair and makeup, then a full day of filming usually follows.

She switches up her exercise routine.

Though running is her main focus, when she can fit it in, Christina also loves yoga (she even made a Prenatal Power Yoga workout video when she was pregnant with Brayden), as well as Orangetheory Fitness, a combination of cardiovascular and strength training.

"It's an awesome workout, super hard and intense, and I noticed a huge change in my body from that," she explains.

Christina makes a habit out of clean-eating.

Meanwhile, her meal plan is just as consistent. "I eat a pretty healthy diet-no fried food, no fast food," she told us. But she doesn't overthink it.

Her go-to recipes are those by her nutritionist friend Cara Clark; the women are actually working on a wellness book together, complete with recipes and tips (tentatively due out around Christmas), as Christina announced in an Instagram Live video.

For breakfast, she'll opt for oatmeal (often overnight oats) and reach for smoothies, and juices for snacks. Some other favorites, as listed in another Live video, include coffee shakes made with Tone It Up protein powder, Perfect bars, and rice cakes with peanut butter for snacks.

"My biggest weakness is peanut butter cups-Justin's because they taste better," she said.

To finish the day, Christina has a healthy dinner with the kids. As she shared in the Live video, that usually means a protein, veggie, grain, and in her glass, her favorite: Champagne.

She takes tons of vitamins-and a supplement for her thyroid disorder.

During that same video, the real estate investor also revealed that she has a thyroid disorder, for which she takes selenium, in addition to her daily multivitamin, vitamin D, vitamin K, fish oil, and an adrenal supplement for a mid-day boost instead of coffee.